4.7. Device configuration

⁠4.7. Device configuration

⁠4.7.1. Disks

To discover the guest domain's disk(s) find and display the content of the disk XML tag(s).

Example 4.46. Get domain's disk information

# Example-39.py
#!/usr/bin/env python3
import sys
import libvirt
from xml.dom import minidom

domName = 'Fedora22-x86_64-1'

conn = None
try:
    conn = libvirt.open("qemu:///system")
except libvirt.libvirtError as e:
    print(repr(e), file=sys.stderr)
    exit(1)

dom = conn.lookupByID(1)
if dom == None:
    print('Failed to find the domain '+domName, file=sys.stderr)
    exit(1)

raw_xml = dom.XMLDesc(0)
xml = minidom.parseString(raw_xml)
diskTypes = xml.getElementsByTagName('disk')
for diskType in diskTypes:
    print('disk: type='+diskType.getAttribute('type')+' device='+diskType.getAttribute('device'))
    diskNodes = diskType.childNodes
    for diskNode in diskNodes:
        if diskNode.nodeName[0:1] != '#':
            print('  '+diskNode.nodeName)
            for attr in diskNode.attributes.keys():
                print('    '+diskNode.attributes[attr].name+' = '+
                 diskNode.attributes[attr].value)

conn.close()
exit(0)

The XML configuration for disks is typically as follows:

⁠

Example 4.47. Domain Disk XML information

<domain type='kvm'>
    ...
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/var/lib/libvirt/images/RHEL7.1-x86_64-1.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
    </disk>
    ...
</domain>